<html>
<head>
<script language="javascript">
    function selectChange()
    {
        document.all.text.value = document.all.select.value;
        window.location.href=  document.all.text.value;
    }
</script>
</head>
<body>
<div>
<select id='select' style="position:absolute;width:300px;clip: rect(0 320 260 280)" onchange="selectChange()">
<option value='http://www.google.com'>"http://www.google.com</option>
<option value='>http://www.baidu.com'>http://www.baidu.com </option>
<option value='http://www.sina.com.cn '> http://www.sina.com.cn </option>
<option value='http://www.sohu.com'> http://www.sohu.com </option>
</select>
<input type='text' id='text'style="position:absolute;width:300px;" value="http://www.google.com" onfocus="this.value='';document.all.select.value='';">
</div>
</body>
</html>
